MECHANICAL-PROPERTIES AND MICROSTRUCTURES OF AL-MG-SC ALLOYS

被引：183

作者：

SAWTELL, RR

JENSEN, CL

机构：

[1] ALCOA Laboratories, Alcoa Center, 15069, PA

来源：

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1990年 / 21卷 / 02期

关键词：

D O I：

10.1007/BF02782422

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The mechanical properties of Al-(Mg)-0.5Sc alloys have been investigated. Room-temperature tensile and toughness properties were found to reflect a superposition of the properties of Al-Mg and Al-0.5Sc alloys and are quite competitive with high-performance Al alloys. A combination of substructure refinement by Mg and stabilization by Al3Sc precipitates produces exceptional superplasticity as exemplified by superplastic forming (SPF) elongations in excess of 1000 pct at a strain rate of 0.01 s-1. Overall, these alloys demonstrate an extremely attractive combination of strength, toughness, density, and SPF fabricability. © 1990 The Minerals, Metals & Materials Society - ASM International - The Materials Information Society.

引用

页码：421 / 430

页数：10

共 23 条

[1]

BAKER C, 1986, ALUMINUM LITHIUM ALL, V3

[2] CONSTITUTION AND AGE HARDENING OF AL-SC ALLOYS [J].

BLAKE, N ;

HOPKINS, MA .

JOURNAL OF MATERIALS SCIENCE, 1985, 20 (08) :2861-2867

[3]

Drits M.D., 1983, METALLOVED TERM OBBR, V7, P60

[4]

Drits M. E., 1981, Soviet Physics - Doklady, V26, P344

[5]

ELAGIN VI, 1983, METALLY TERM OBBRAB, V7, P57

[6] SOLID SOLUBILITY AND RESIDUAL RESISTIVITY OF SCANDIUM IN ALUMINUM [J].

FUJIKAWA, SI ;

SUGAYA, M ;

TAKEI, H ;

HIRANO, K .

JOURNAL OF THE LESS-COMMON METALS, 1979, 63 (01) :87-97

[7] SUPERPLASTICITY IN LARGE GRAINED MATERIALS [J].

GRIFFITHS, P ;

HAMMOND, C .

ACTA METALLURGICA, 1972, 20 (07) :935-+

[8]

HENSHALL CA, 1985, SAMPE ADV TECHNOLOGY, V30, P994

[9]

Hildeman Gregory J, 1983, United States patent, Patent No. [US 4 379 719, 4379719]

[10]

KAHN NA, 1956, WELDING RES S, pS217

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